{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2026-64528",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-64528",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-07-25T09:20:51.774Z",
    "updatedAt": "2026-07-25T09:20:51.774Z",
    "importedAt": "2026-10-24T01:58:25.636Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "tty: serial: samsung: Remove redundant port lock acquisition in rx helpers",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\ntty: serial: samsung: Remove redundant port lock acquisition in rx helpers\n\nSashiko identified a deadlock when the console flow is engaged [1].\n\nWhen console flow control is enabled (UPF_CONS_FLOW),\ns3c24xx_serial_stop_tx() calls s3c24xx_serial_rx_enable() and\ns3c24xx_serial_start_tx() calls s3c24xx_serial_rx_disable().\n\nThe serial core framework invokes the .stop_tx() and .start_tx()\ncallbacks with the port->lock spinlock already held. Furthermore, all\ninternal driver paths that invoke stop_tx (such as the DMA TX\ncompletion handler s3c24xx_serial_tx_dma_complete() or the PIO TX IRQ\nhandler s3c24xx_serial_tx_irq()) also acquire port->lock prior to\ncalling it. (Note that s3c24xx_serial_start_tx() is only invoked by the\nserial core).\n\nHowever, s3c24xx_serial_rx_enable() and s3c24xx_serial_rx_disable()\nunconditionally attempt to acquire port->lock again using\nuart_port_lock_irqsave(). Since spinlocks are not recursive, this\ncauses a deadlock on the same CPU when console flow control is engaged.\n\nRemove the redundant lock acquisition from both rx helper functions.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "b497549a035c2a81b71c7a27f2b00c8a16c09423",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ee9eb72be95490602c493db050c73d925c3a4d74"
            },
            {
              "version": "b497549a035c2a81b71c7a27f2b00c8a16c09423",
              "status": "affected",
              "versionType": "git",
              "lessThan": "10014eb7eee351f7b587f8ac85830f0c9343cb9a"
            },
            {
              "version": "b497549a035c2a81b71c7a27f2b00c8a16c09423",
              "status": "affected",
              "versionType": "git",
              "lessThan": "f4c3e63fa8639aedf96fb200d9939945a9eed51e"
            },
            {
              "version": "b497549a035c2a81b71c7a27f2b00c8a16c09423",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a9c22e0f93ba18322a6623ecdda2f0cd858ca350"
            },
            {
              "version": "b497549a035c2a81b71c7a27f2b00c8a16c09423",
              "status": "affected",
              "versionType": "git",
              "lessThan": "14143ec10d69f42806b5d7b046f0fd1b835831ae"
            },
            {
              "version": "b497549a035c2a81b71c7a27f2b00c8a16c09423",
              "status": "affected",
              "versionType": "git",
              "lessThan": "9fd48937046efc9abb89379d63ee9cc5c661d711"
            },
            {
              "version": "b497549a035c2a81b71c7a27f2b00c8a16c09423",
              "status": "affected",
              "versionType": "git",
              "lessThan": "9c92b42207978559e32903c3098aaf5c5b5788b2"
            },
            {
              "version": "b497549a035c2a81b71c7a27f2b00c8a16c09423",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a3bb136bff5e6a5e48cdd813246c9c4686feaaa9"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "2.6.27",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "2.6.27"
            },
            {
              "version": "5.10.259",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.210",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.176",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.143",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.93",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.35",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.0.12",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.0.*"
            },
            {
              "version": "7.1",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}